Electric leakage monitoring method and system based on low-voltage electric leakage positioning device

Abstract

The invention provides an electric leakage monitoring method and system based on a low-voltage electric leakage positioning device, and the method comprises the steps: connecting the electric leakage positioning device to a data collection device or system, obtaining related data information, and storing and analyzing the collected data information; performing grade division according to states of electrical equipment, a system and the like, and defining a first leakage current as LCurrent1; calculating an adjusting parameter ALC of the leakage current according to the temperature condition Temp and the voltage change condition delta Voltage; an electric leakage safety monitoring model is established, when an electric leakage phenomenon is detected, the data processing unit immediately triggers an alarm, and electric leakage information is sent to a monitoring center through the communication module. According to the invention, through combination of low-voltage equipment, precise monitoring and safety prevention and control, accurate monitoring of electric leakage is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of leakage monitoring, and relates to a leakage monitoring method and system, in particular to a leakage monitoring method and system based on a low-voltage leakage locating device. Background Art

[0002] With the continuous development of my country's power grid construction, the safe operation of low-voltage power grids has received more and more attention. Leakage is a common safety hazard in low-voltage power grids, which may lead to serious consequences such as electric shock accidents and electrical fires. Although the existing leakage protection device can prevent leakage accidents to a certain extent, it cannot accurately locate the leakage point, which brings inconvenience to fault detection and handling.

[0003] However, traditional leakage monitoring methods usually require the use of high-voltage equipment and have limited positioning accuracy.

[0004] Therefore, in order to solve the above problems, the present invention proposes a leakage monitoring method and system based on a low-voltage leakage locating device.

[0005] After searching, no public documents of the prior art identical or similar to the present invention were found. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a leakage monitoring method based on a low-voltage leakage locating device, which realizes accurate monitoring of leakage by combining low-voltage equipment with precise monitoring and safety prevention and control.

[0007] The present invention solves the practical problem by adopting the following technical solutions:

[0008] A leakage monitoring method based on a low-voltage leakage locating device comprises the following steps:

[0009] Step S1. Acquire relevant data information by connecting the leakage locating device to a data acquisition device or system, and store and analyze the acquired data information;

[0010] Step S2. Classify the electrical equipment and the system according to their status, and define the first leakage current as L_Current1;

[0011] Step S3. Calculate the adjustment parameter ALC of the leakage current according to the temperature Temp and the voltage variation ΔVoltage;

[0012] Step S4. Establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm and sends the leakage information to the monitoring center through the communication module.

[0013] Further, step S2 specifically includes:

[0014] Classify the equipment and system according to their status, and set the leakage current to L_Current and the voltage to Voltage. The leakage current within the standard range is set to L_Current. bd , the initial specific process is as follows:

[0015] When the electrical equipment and system are in normal state, the first leakage current is defined as L_Current1, L_Current1 = α1*L_Current bd ;

[0016] When the electrical equipment and system are in the alert state, the first leakage current is defined as L_Current1, L_Current1 = α2*L_Current bd ;

[0017] When the electrical equipment and system are in a dangerous state, the first leakage current is defined as L_Current1, L_Current1 = α3*L_Current bd ;

[0018] When the electrical equipment and system are in a fault state, the first leakage current is defined as L_Current1, L_Current1 = α4*L_Current bd ;

[0019] Among them, α1, α2, α3, and α4 represent the adjustment coefficients corresponding to the normal state, the warning state, the dangerous state, and the fault state respectively; and α1, α2, α3, and α4>0.

[0020] Further, step S3 specifically includes:

[0021] According to the voltage change, calculate the power consumption PowCon. The specific process is as follows:

[0022]

[0023] Among them, Ecost represents the electricity cost under normal conditions; Ecost0 represents the initial energy cost; Ecost t,ref represents the expected total cost of electrical equipment and system work at time t; Sh represents the constant coefficient; μ represents the learning factor; Am L_dem It represents the average amplitude of the change in load demand; Ro represents the comprehensive profit of electrical equipment and system during operation; Prc represents the market price of electric energy.

[0024] Further, step S3 specifically includes:

[0025] Compare the leakage current adjustment parameter ALC with the preset leakage current adjustment parameter ALC', and correct the leakage current according to the comparison result;

[0026] Pre-define the leakage current adjustment parameter as ALC', and the specific process is as follows:

[0027] If ALC < ALC', then define the corrected leakage current as L_Current2,

[0028] If ALC > ALC', then define the corrected leakage current as L_Current2,

[0029] If ALC = ALC', then define the corrected leakage current as L_Current2, Among them, δ1 and δ2 respectively represent the comparison coefficients in the corresponding different situations, and δ1 ≠ δ2.

[0030] Furthermore, step S4 specifically includes:

[0031]

[0032] Among them, Safe represents the output result of the leakage safety monitoring, t0 ∈ [0, t]; Ind(C) represents the fault influence function during the operation of the electrical equipment and system; Pg out represents the output power of the distributed energy; represents the output power at the current moment t0; Q1 represents the influence coefficient; Tal represents the total energy value entering the energy storage system; L represents the monitoring coefficient; μ' represents the model balance factor.

[0033] A leakage monitoring system based on a low-voltage leakage positioning device includes the following:

[0034] A positioning device module, a communication module, a data acquisition module, a data processing module, a leakage safety monitoring, and a leakage alarm module;

[0035] The positioning device module obtains relevant electrical equipment and system data information through different installed sensors, positioning devices, and positioning technologies;

[0036] The communication module includes a wireless communication module or a wired communication module to ensure that the leakage monitoring system can transmit data and receive instructions in real time;

[0037] The data acquisition module receives the information collected by the leakage current sensor, voltage sensor, etc., and is used to collect leakage-related data and transmit it to the data processing module;

[0038] The data processing module classifies electrical equipment and system status and defines leakage current;

[0039] Leakage safety monitoring: establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm.

[0040] The leakage alarm module is used to promptly notify relevant personnel and take necessary measures when a leakage event occurs.

[0041] The beneficial effects of the present invention are:

[0042] 1. The present invention proposes a leakage monitoring method and system based on a low-voltage leakage locating device. By dividing the status of electrical equipment and systems and timely discovering signs of faults, preventive maintenance measures can be taken to improve the reliability and durability of equipment; by effectively managing the equipment status and leakage current, sudden failures can be avoided and the cost of repairing and replacing equipment can be reduced; regular monitoring of the status of electrical equipment and systems and identification of potential safety hazards can reduce the possibility of accidents and improve the safety of the system.

[0043] 2. The present invention adjusts the leakage current according to the ambient temperature and voltage changes, which can improve the accuracy and precision of monitoring and timely discover potential safety hazards; by adjusting according to the temperature and voltage conditions, it can reduce false alarms caused by environmental factors and improve the accuracy and reliability of the leakage monitoring system; accurately monitoring the leakage current and adjusting the parameters according to the environmental conditions can improve the safety of the electrical system and reduce the safety risks caused by leakage. The voltage changes will indicate the existence of faults or problems in the electrical system. By monitoring the power consumption, abnormal conditions can be discovered in time and fault diagnosis can be performed, reducing downtime and improving the reliability and stability of the system; regular monitoring of power consumption can help identify the operating status and health of the equipment, discover equipment wear and aging problems in advance, and carry out targeted maintenance and care to extend the service life of the equipment.

[0044] 3. By comparing the actual leakage current adjustment parameters with the preset parameters, the present invention can help discover potential errors or abnormal situations, and correct the leakage current, so as to achieve real-time adjustment of the leakage current and ensure that the monitoring system responds to the leakage situation in a timely manner. By correcting the leakage current, unnecessary energy waste can be reduced, the energy utilization efficiency of the system can be optimized, and the purpose of energy conservation and emission reduction can be achieved; accurate monitoring and adjustment of the leakage current can improve the safety of the electrical system, avoid safety accidents caused by leakage problems, and ensure the safety of equipment and personnel.

[0045] 4. The present invention can be combined with a remote monitoring system by establishing a leakage safety monitoring model, so that the alarm information can be transmitted to relevant personnel or a monitoring center in real time to achieve remote monitoring and management; timely alarms can prompt preventive measures to prevent leakage incidents from happening again, thereby improving the stability and safety of the system; automatically triggering alarms will reduce the need for human intervention, improve the efficiency of monitoring and alarming, and help solve problems quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A flow chart of a leakage monitoring method based on a low-voltage leakage locating device of the present invention;

[0047] Figure 2 The present invention is a module diagram of a leakage monitoring system based on a low-voltage leakage locating device. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0049] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should also be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] Refer to the attached Figure 1 This embodiment provides a leakage monitoring method based on a low-voltage leakage locating device, comprising the following steps:

[0051] S1. Install leakage locating devices in the low-voltage power grid, and select according to different actual conditions, including but not limited to residual current devices (RCD), current transmitters, current sensors, voltage sensors, alarms, temperature sensors, humidity sensors, etc. Connect the leakage locating device to the data acquisition equipment or system to ensure that the data information can be accurately collected and recorded; at the same time, store and analyze the collected data information.

[0052] Classify the equipment and system according to their status, and set the leakage current to L_Current and the voltage to Voltage. The leakage current within the standard range is set to L_Current. bd , the initial specific process is as follows:

[0053] When the electrical equipment and system are in normal state, the equipment is operating normally, the insulation is in good condition, the leakage risk is low, and generally no special intervention is required; the first leakage current is defined as L_Current1, L_Current1 = α1*L_Current bd ;

[0054] When electrical equipment and systems are in alert state, there are some potential problems with the equipment, insulation degradation or other abnormal conditions may occur, and the leakage risk is low but needs close attention; the first leakage current is defined as L_Current1, L_Current1 = α2*L_Current bd ;

[0055] When electrical equipment and systems are in a dangerous state, there is a serious insulation fault or other potential danger in the equipment, the risk of leakage is high, and it needs to be repaired or replaced immediately, and emergency measures should be taken to ensure safety; then the first leakage current is defined as L_Current1, L_Current1 = α3*L_Current bd ;

[0056] When the electrical equipment and system are in a fault state, the equipment has experienced a leakage accident or the insulation has completely failed, and emergency treatment and repair are required to avoid causing greater safety risks; the first leakage current is defined as L_Current1, L_Current1 = α4*L_Current bd ;

[0057] Among them, α1, α2, α3, and α4 represent the adjustment coefficients corresponding to the normal state, the warning state, the dangerous state, and the fault state respectively; and α1, α2, α3, and α4>0.

[0058] The present invention divides the states of electrical equipment and systems, promptly discovers signs of faults, and can take preventive maintenance measures to improve the reliability and durability of equipment; by effectively managing equipment status and leakage current, it can avoid the occurrence of sudden failures and reduce the cost of repairing and replacing equipment; regularly monitoring the status of electrical equipment and systems and identifying potential safety hazards can reduce the possibility of accidents and improve the safety of the system.

[0059] S2. Calculate the adjustment parameter ALC of the leakage current according to the temperature Temp and the voltage variation ΔVoltage;

[0060]

[0061] Among them, Temp t represents the temperature of the electrical equipment at time t, t∈[1,T], T represents the total recording time; represents the average temperature of the electrical equipment during operation; β1 represents the temperature control coefficient; F(Temp) represents the influence function of temperature change on the electrical equipment and system; ΔVoltage represents the voltage change of the electrical equipment and system; Par Voltage Indicates the average amplitude of voltage changes in electrical equipment.

[0062] Calculate the power consumption PowCon according to the voltage variation. The specific process is as follows:

[0063]

[0064] Among them, Ecost represents the power cost under normal conditions; Ecost0 represents the initial energy cost; Ecost t,ref represents the expected total cost of the operation of electrical equipment and systems at time t; Sh represents a constant coefficient; μ represents a learning factor; Am L_dem represents the average amplitude of the change in load demand; Ro represents the comprehensive profit situation during the operation of electrical equipment and systems; Prc represents the market price of electric energy.

[0065] The present invention can adjust the leakage current according to the ambient temperature and voltage variation, which can improve the accuracy and precision of monitoring, and timely detect potential safety hazards; by adjusting according to the temperature and voltage conditions, false alarms caused by environmental factors can be reduced, and the accuracy and reliability of the leakage monitoring system can be improved; accurately monitoring the leakage current and adjusting parameters according to the environmental conditions can improve the safety of the electrical system and reduce the safety risks brought by leakage. The voltage variation will imply faults or problems existing in the electrical system. By monitoring the power consumption, abnormal situations can be detected in time and fault diagnosis can be carried out, reducing the downtime and improving the reliability and stability of the system; regularly monitoring the power consumption can help identify the operating status and health conditions of the equipment, detect problems such as equipment wear and aging in advance, and carry out targeted maintenance and repair to extend the service life of the equipment.

[0066] S3. Compare the adjusted parameter ALC of the leakage current with the preset adjusted parameter ALC' of the leakage current, and correct the leakage current according to the comparison result.

[0067] In the embodiment of the present invention, the adjusted parameter of the leakage current is predefined as ALC'. Based on the first leakage current L_Current1, the corrected leakage current is L_Current2. The specific process is as follows:

[0068] If ALC < ALC', then define the corrected leakage current as L_Current2,

[0069] If ALC > ALC', then define the corrected leakage current as L_Current2,

[0070] If ALC = ALC', then define the corrected leakage current as L_Current2, Among them, δ1 and δ2 represent the contrast coefficients in different corresponding situations, and δ1≠δ2.

[0071] By comparing the actual leakage current adjustment parameters with the preset parameters, the present invention can help discover potential errors or abnormal conditions, and correct the leakage current, thereby achieving real-time adjustment of the leakage current and ensuring that the monitoring system can respond to the leakage condition in a timely manner. By correcting the leakage current, unnecessary energy waste can be reduced.

[0072] S4. Establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm and sends the leakage information to the monitoring center through the communication module. After receiving the leakage information, the monitoring center immediately notifies the maintenance personnel to go to the leakage point for processing.

[0073]

[0074] Where Safe represents the output result of leakage safety monitoring, t0∈[0,t]; Ind(C) represents the fault influence function during the operation of electrical equipment and system; Pg out Represents the output power of distributed energy; represents the output power at the current time t0; Q1 represents the influence coefficient; Tal represents the total energy entering the energy storage system; L represents the monitoring coefficient; μ' represents the model balance factor.

[0075] The present invention can be combined with a remote monitoring system by establishing a leakage safety monitoring model, so that the alarm information can be transmitted to relevant personnel or a monitoring center in real time, thereby realizing remote monitoring and management; timely alarms can prompt preventive measures to be taken to prevent leakage events from happening again, thereby improving the stability and safety of the system; automatically triggering alarms will reduce the need for human intervention, improve the efficiency of monitoring and alarming, and help to quickly solve problems.

[0076] Refer to the attached Figure 2 This embodiment provides a leakage monitoring system based on a low-voltage leakage locating device, including the following contents:

[0077] Positioning device module, communication module, data acquisition module, data processing module, leakage safety monitoring, leakage alarm module;

[0078] Positioning device module, which obtains relevant electrical equipment and system data information through installed different sensors, positioning devices and positioning technologies;

[0079] Communication module, including wireless communication module (such as Wi-Fi, Bluetooth, LoRa, etc.) or wired communication module, to ensure that the leakage monitoring system can transmit data and receive instructions in real time;

[0080] A data acquisition module receives information collected by leakage current sensors, voltage sensors, etc., and is used to collect leakage-related data and transmit it to a data processing module;

[0081] The data processing module classifies electrical equipment and system status and defines leakage current;

[0082] Leakage safety monitoring: establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm.

[0083] The leakage alarm module is used to promptly notify relevant personnel and take necessary measures when a leakage event occurs.

[0084] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0085] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0086] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0087] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0088] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A leakage monitoring method based on a low-voltage leakage locating device, characterized in that: The following steps are involved: Step S1. Acquire relevant data information by connecting the leakage locating device to a data acquisition device or system, and store and analyze the acquired data information; Step S2. Classify the electrical equipment and the system according to their status, and define the first leakage current as L_Current1; Step S3. Calculate the adjustment parameter ALC of the leakage current according to the temperature Temp and the voltage variation ΔVoltage; Step S4. Establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm and sends the leakage information to the monitoring center through the communication module.

2. A leakage monitoring method based on a low-voltage leakage locating device according to claim 1, characterized in that: The step S2 specifically includes: Classify the equipment and system according to their status, and set the leakage current to L_Current and the voltage to Voltage. The leakage current within the standard range is set to L_Current. bd , the initial specific process is as follows: When the electrical equipment and system are in normal state, the first leakage current is defined as L_Current1, L_Current1 = α1*L_Current bd ; When the electrical equipment and system are in the alert state, the first leakage current is defined as L_Current1, L_Current1 = α2*L_Current bd ; When the electrical equipment and system are in a dangerous state, the first leakage current is defined as L_Current1, L_Current1 = α3*L_Current bd ; When the electrical equipment and system are in a fault state, the first leakage current is defined as L_Current1, L_Current1 = α4*L_Current bd ; Among them, α1, α2, α3, and α4 represent the adjustment coefficients corresponding to the normal state, the warning state, the dangerous state, and the fault state respectively; and α1, α2, α3, and α4>0.

3. A leakage monitoring method based on a low-voltage leakage locating device according to claim 1, characterized in that: The step S3 specifically includes: According to the voltage change, calculate the power consumption PowCon. The specific process is as follows: Among them, Ecost represents the electricity cost under normal conditions; Ecost0 represents the initial energy cost; Ecost t，ref represents the expected total cost of electrical equipment and system work at time t; Sh represents the constant coefficient; μ represents the learning factor; Am L_dem It represents the average amplitude of the change in load demand; Ro represents the comprehensive profit of electrical equipment and system during operation; Prc represents the market price of electric energy.

4. A leakage monitoring method based on a low-voltage leakage locating device according to claim 1, characterized in that: The step S3 specifically includes: Compare the leakage current adjustment parameter ALC with the preset leakage current adjustment parameter ALC', and correct the leakage current according to the comparison result; The leakage current adjustment parameter is predefined as ALC', and the specific process is as follows: If ALC<ALC', then the corrected leakage current is defined as L_Current2. If ALC>ALC', then the corrected leakage current is defined as L_Current2. If ALC=ALC', then the corrected leakage current is defined as L_Current2. Among them, δ1 and δ2 represent the contrast coefficients in different corresponding situations, and δ1≠δ2.

5. A leakage monitoring method based on a low-voltage leakage locating device according to any one of claims 3 or 4, characterized in that: The step S4 specifically includes: Where Safe represents the output result of leakage safety monitoring, t0∈[0, t]; Ind(C) represents the fault influence function during the operation of electrical equipment and system; Pg out Represents the output power of distributed energy; represents the output power at the current time t0; Q1 represents the influence coefficient; Tal represents the total energy entering the energy storage system; L represents the monitoring coefficient; μ' represents the model balance factor.

6. A leakage monitoring system based on a low-voltage leakage locating device, applied to a leakage monitoring method based on a low-voltage leakage locating device as claimed in claim 1, characterized in that: Includes the following: Positioning device module, communication module, data acquisition module, data processing module, leakage safety monitoring, leakage alarm module; Positioning device module, which obtains relevant electrical equipment and system data information through installed different sensors, positioning devices and positioning technologies; Communication module, including wireless communication module or wired communication module, to ensure that the leakage monitoring system can transmit data and receive instructions in real time; A data acquisition module receives information collected by leakage current sensors, voltage sensors, etc., and is used to collect leakage-related data and transmit it to a data processing module; The data processing module classifies electrical equipment and system status and defines leakage current; Leakage safety monitoring: establish a leakage safety monitoring model. When leakage is detected, the data processing unit immediately triggers an alarm. The leakage alarm module is used to promptly notify relevant personnel and take necessary measures when a leakage event occurs.

Images